Metal nano-void photonic crystal for enhanced Raman spectroscopy
US7483130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2005 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Apr 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/658
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A planar optical platform for generating a Raman signal from a foreign object comprises an input region and an output region, for receiving and extracting optical radiation, optically coupled to a plasmonic band structure region. The plasmonic band structure region comprises a layer of a first material, having a first refractive index, patterned with an array of sub-regions of a second material, having a second refractive index, wherein a side-wall of each sub-region is coated with a metallodielectric layer. The array of sub-regions gives rise to a plasmonic band structure and, in use, each sub-region confines a plasmon resonance excited by optical radiation coupled into the plasmonic band structure region, which gives rise to a Raman signal from a foreign object placed proximate the plasmonic band structure region. The platform may be incorporated into a spectroscopic measurement system and is particularly useful for surface-enhanced Raman spectroscopy of analyte molecules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.